A. 1) containing strong emotions or feelings 2) extremeAn intense film is one which emotionally drains you or makes you tired. Intense is not necessarily negative, it just means that a movie is not light or relaxing.

light

A. relaxing, amusing, not too intenseThis is the opposite of "intense."

mainstream

A. something which is usual, or commonly doneMainstream films are those which are usually high-budget, popular, and made for entertainment. "Mainstream" is the opposite of "alternative."

superficial

A. 1) not deep or profound; lacking real content 2) only on the surface

suspenseful

A. something which makes you keep guessing or makes you question how something will end

thought-provoking

A. something which makes you think used to describe many different things, such as movies, books, conversations, ideas, issues, etc.